package com.heima.app.gateway.filter;

import com.heima.app.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.SignatureException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;

@Component
@Slf4j
public class AppFilter implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().toString();
        if (url.contains("login")) {
            log.info("直接放行");
            return chain.filter(exchange);
        }
        HttpHeaders headers = request.getHeaders();
        String token = headers.getFirst("token");
        if (StringUtils.isEmpty(token)) {
            log.info("token为空，未登录");
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        int i ;
        try {
            i = AppJwtUtil.verifyToken(AppJwtUtil.getClaimsBody(token));
        } catch (SignatureException e) {
            throw new RuntimeException(e);
        }
        if (i == 1 || i == 2) {
            log.info("过期token");
            //过期
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        log.info("登录成功");
        return chain.filter(exchange);
    }
}
